Portable, weather-resistant golf practice device

ABSTRACT

A portable, weather-resistant golf practice device is disclosed. The golf practice device of the present invention includes a multi-dimensionally adjustable practice platform that enables a golfer to repetitively practice shots under conditions that realistically simulate various combinations of uphill, downhill, or sidehill lies, as well as various grass lengths and sand trap conditions. The golf practice device of the present invention is user programmable, relatively inexpensive, lightweight, easily moved by one person, completely portable by two persons, and exhibits enhanced weather resistance. The golf practice device of the present invention minimizes height between the ground and the top of the practice platform, or “step-up” height to provide a golf practice device that is easily and comfortably used.

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] Under the provisions of 35 U.S.C. §119(e), priority is claimedfrom U.S. Provisional Patent Application Serial No. 60/179,952, filed onFeb. 2, 2000. This application is also a continuation of applicationSer. No. 09/775,966, filed Feb. 2, 2001, pending.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a golf practice device.Specifically, the present invention relates to a portable,weather-resistant golf practice device including a practice platformcapable of electronically controlled multi-dimensional adjustment.

[0004] 2. State of the Art

[0005] In order to improve the consistency, distance, and accuracy oftheir golf shots, it is essential for golfers to spend a considerableamount of time practicing. It is accepted by many that the bestenvironment for such practice is the golf course itself. This is truebecause golf courses generally encompass a variety of terrain, includinguphill, downhill, and sidehill grades, varying lengths of grass, andsand traps of diverse grades and shapes, and it is difficult to simulatesuch conditions in an off-course environment. However, playing a roundof golf is time consuming and can be expensive. Moreover, because theobjective in golf is to complete a round with the least amount ofstrokes, playing a round of golf does not provide the golfer aneffective opportunity to repetitively practice shots made underparticular combinations of course conditions.

[0006] Practice ranges provide a partial solution to golfers' practiceneeds. In general, practice ranges are easily accessed, inexpensive, andenable the golfer to spend as much or as little time practicing asdesired. Additionally, practice ranges provide an excellent environmentfor repetitive practice.

[0007] However, practice ranges are not without disadvantages. Forinstance, practice ranges generally simulate only the most idealconditions on a golf course (i.e., the tee-boxes provided on practiceranges are generally level and cannot simulate the varying grades, grasslengths, or sand traps encountered on a golf course). Even wherepractice ranges include practice areas providing some terrain diversity,the shots a golfer can practice at such facilities are still limited bythe terrain provided, and where a practice range includes diversepractice areas, these areas are often surfaced with natural turf, whichis difficult and expensive to maintain. Moreover, traveling to and froma practice range only to have to move from one practice area to anotheris inconvenient for many. Therefore, it would be desirable to provide adevice that enables a golfer to repetitively practice shots thataccurately simulate the varying uphill, downhill, or sidehill lies,grass lengths, and sand traps encountered on a golf course withouthaving to play a round of golf, move from area to area within a practicerange, or even visit a practice range at all.

[0008] Several devices have been developed in an attempt to answer thisneed. For example, U.S. Pat. Nos. 5,720,670, 5,470,074, 5,358,251,5,340,111, 4,875,684, and 3,633,918 disclose golf practice devicesincorporating adjustable platforms upon which a golfer may stand torepetitively practice shots simulating various combinations of courseconditions. However, each of the devices taught in these patents suffersshortcomings which diminish its value to the user. In particular, noneof the devices embodies a golf practice device that is comfortable touse, weather resistant, programmable, sufficiently lightweight andportable to be useful in practice range and backyard environments, andcapable of simulating varying uphill, downhill, and sidehill grades, aswell as varying grass lengths and sand trap conditions. Therefore, thedevices disclosed in these patents have not enjoyed widespreadcommercialization, and a golf practice device which embodies all ofthese described characteristics would be an improvement in the art.

SUMMARY OF THE INVENTION

[0009] The portable, weather-resistant golf practice device of thepresent invention includes a practice platform, an adjustable supportassembly, and an electronic control unit. The practice platform is sizedto provide a practice area wherein a user can address a golf ball andpractice various golf shots. Due to the construction of the golfpractice device of the present invention, the height between the groundand the top of the practice platform, or “step-up” height, issubstantially reduced relative to existing devices, making the golfpractice device of the present invention easier and more comfortable touse. Moreover, the practice platform may include a device allowing thesimulation of various grass lengths or sand-trap conditions. Throughadjustment of the adjustable support assembly, the practice platform maybe moved multi-dimensionally to accurately simulate a wide variety ofuphill lies, downhill lies, or sidehill lies, including combinations ofuphill or downhill and sidehill lies. Adjustment of the adjustablesupport assembly is carried out using the electronic control unit andmay be manually executed or automatically executed using apre-programmed routine. Thus, the golf practice device of the presentinvention is weather resistant, portable, comfortable to use, accuratelysimulates a wide range of golf shots, including shots taken from avariety of uphill, downhill, or sidehill lies. The golf practice deviceof the present invention enables a user to practice such shots withoutplaying a round of golf and without moving from one area to anotherwithin a practice facility or, when used in a home environment, withouteven visiting a practice facility.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In the drawings:

[0011]FIG. 1 illustrates a first embodiment of the golf practice deviceof the present invention;

[0012]FIG. 2 through FIG. 5 illustrate adjustable support assembliesuseful in conjunction with the first embodiment of the golf practicedevice of the present invention;

[0013]FIG. 6 and FIG. 10 illustrate a second embodiment of the golfpractice device of the present invention;

[0014]FIG. 7 through FIG. 9 illustrate adjustable support assembliesuseful in conjunction with the second embodiment of the golf practicedevice of the present invention;

[0015]FIG. 11 illustrates a practice platform of the golf practicedevice of the present invention;

[0016]FIG. 12 provides a cross-sectional view of a portion of thestanding area of a practice platform of the golf practice device of thepresent invention;

[0017]FIG. 13 through FIG. 15 illustrate different inserts useful inconjunction with the practice platform of the golf practice device ofthe present invention;

[0018]FIG. 16 illustrates an exemplary user interface included in theelectronic control unit of the golf practice device of the presentinvention; and

[0019]FIG. 17 provides a schematic illustration of an embodiment of thegolf practice device according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0020] A first embodiment of the golf practice device of the presentinvention is illustrated in FIG. 1. As in each of the embodiments of thepresent invention, the golf practice device 10 according to the firstembodiment includes an adjustable support assembly 12, a practiceplatform 14, and an electronic control unit 16. As can be appreciated byreference to FIG. 1, the adjustable support assembly 12 of the firstembodiment of the golf practice device 10 of the present inventionunderlies the practice platform 14, supporting the practice platform 14from underneath.

[0021] Exemplary adjustable support assemblies 12 that may be used inthe first embodiment of the present invention are illustrated in FIG. 2and FIG. 3. The adjustable support assemblies 12 include a base 18, aplatform support 20, a central universal joint 22, and at least twoindependent actuators 24 a, 24 b capable of manipulating the position ofthe platform support 20. The central universal joint 22 is positionedbetween the base 18 and the platform support 20 and allows the platformsupport 20 to move multi-dimensionally relative to the base. As it isused herein, the term “universal joint” refers to any joint or bearingwhich facilitates simultaneous movement about at least two differentaxes.

[0022] As is shown in FIG. 2 and FIG. 3, the base 18 and platformsupport 20 of the adjustable support assembly 12 of the first embodimentof the present invention may include frame structures constructed ofstructural members. The construction of the base 18 and platform support20, however, is not so limited. For example, the base 18 and platformsupport 20 may also be constructed of a generally planar sheet ofmaterial. Moreover, the base 18 may include any structure providing asuitable mounting point (i.e., sufficiently robust to withstand thesignificant stresses imposed during use of the golf practice device 10of the present invention) for the actuators 24 a, 24 b or centraluniversal joint 22 of the adjustable support assembly 12. For instance,instead of a frame structure or generally planar sheet of material, thebase 18 may be a concrete slab, a metal or concrete post, or even thedeck of a boat or ship. It is preferred, however, to construct the base18 and platform support 20 of the adjustable support assembly 12 of thefirst embodiment of the present invention using frame structures, assuch a construction yields a relatively lightweight, yet durable,adjustable support assembly 12.

[0023] In addition, any material or combination of materials may be usedto construct the base 18 or platform support 20 of the adjustablesupport assembly 12 of the first embodiment, as long as such materialsare weather resistant, corrosion resistant, and sufficiently robust toproduce a base 18 and platform support 20 capable of withstanding thestresses exerted during use of the golf practice device 10 of thepresent invention. For example, coated steel, stainless steel, aluminumalloy, titanium alloy, composite materials, polymer materials, or anycombination thereof, may be used to fabricate the base 18 or platformsupport 20, and where the base 18 or platform support are fabricated ofgenerally planar sheet material, composite structural materials, such asthose manufactured by M.C. Gill Corp. of El Monte, California, USA, forexample, are preferably used. Moreover, the base 18 and platform support20 may be fabricated using any suitable fabrication technique, such asany known cutting, welding, riveting, or bonding techniques. However, itis presently preferred to construct the adjustable support assembly 12of the first embodiment using a base 18 and platform support 20constructed of welded steel structural members 30 provided with asuitable corrosion resistant coating.

[0024] Where the platform support 20 of the adjustable support assembly12 includes a frame structure, the platform support 20 also preferablyincludes a platform member 32 (illustrated in FIG. 4). The platformmember 32 may be affixed to the frame structure of the platform support20 by means known in the art, such as rivets, bolts, screws, or welds.As can be seen in FIG. 4, the platform member 32 includes an uppersurface 38 which is continuous and substantially planar, as well as anouter perimeter formed by a flange 42 extending downward and generallyperpendicularly away from the upper surface 38. It is preferred that theflange 42 be continuous with the remainder of the platform member 32.

[0025] The platform member 32 may also be constructed using materialsand methods known in the art and may be attached to the frame structureby any known means, provided that the materials and means used result ina platform member 32 that is corrosion resistant, weather resistant, andable to withstand the stresses exerted during use of the golf practicedevice of the present invention. For example, the platform member 32 maybe constructed of separate pieces of metal stock that are cut and weldedto form a platform member 32 having a continuous and substantiallyplanar upper surface 38 and an outer perimeter formed by a downwardlyextending flange 42, or substantially the same result may be achievedusing a single piece of metal stock, which is cut, bent, and welded tothe appropriate size and shape. Additionally, the platform member 32 maybe constructed of any suitable polymer or composite materials, such asthe composite structural materials manufactured by M.C. Gill Corp.However, it is presently preferred to fabricate the platform member 32by welding multiple pieces of aluminum stock together. It is furtherpreferred to mount the platform member 32 to the frame structure of theplatform support 20 using stainless steel rivets.

[0026] The continuous nature of the upper surface 38 and flange 42 ofthe platform member 32 is significant. Such a design easily sheds water,dirt and debris away from electrical or mechanical systems underlyingthe platform support 20. Several existing golf practice devices includeplatforms that are compromised by perforations or holes made toaccommodate tees, ball holders, foot switches, grass adjustingmechanisms, and the like. Each such perforation or hole in the platformserves as an additional avenue for water, dirt, and debris to passthrough the platform and contact the associated mechanical andelectrical systems underlying the platform of these existing devices.Therefore, the substantially continuous, uncompromised platform member32 surrounded by a downward extending flange 42, as shown in FIG. 4,results in a golf practice device which is substantially resistant toincursions of water, dirt, and debris.

[0027] Where the platform support 20 of the adjustable support assembly12 of the first embodiment is formed from a generally planar sheet ofmaterial, there is no need to provide a platform member 32. However,even where the platform support 20 of the adjustable support assembly 12of the first embodiment of the present invention is constructed using agenerally planar sheet of material, it is preferred that the platformsupport 20 include a flange that is continuous with a top surface of theplatform support 20, extends around the perimeter of the platformsupport 20, and extends downward and generally perpendicularly away fromthe top surface of the platform support 20.

[0028] As illustrated in FIG. 2 and FIG. 3, the central universal joint22 included in the adjustable support assembly 12 of the firstembodiment may be established by providing a joint which enablessimultaneous pivoting about a first horizontal axis 44 and a secondhorizontal axis 46, the horizontal axes 44, 46 being positionedsubstantially orthogonally relative to one another. Such a centraluniversal joint 22 is preferably mounted to the base 18 and the platformsupport 20 using pivotal or spherical bearings 48. However, theadjustable support assembly 12 may be fabricated using any combinationof universal joint and mounting means known in the art that allows theplatform support 20 to simultaneously move about at least two axes(i.e., multi-dimensionally) relative to the base 18. Also, the centraluniversal joint 22 not only allows the platform support 20 to movemulti-dimensionally relative to the base 18, but serves as a loadbearing member supporting the platform support 20, the practice platform14, and a golfer. Therefore, the central universal joint 22, as well asany mounting means, such as the pivotal or spherical bearings 48 used toaffix the central universal joint 22 to the base 18 and the platformsupport 20, should be fabricated using materials providing a structurecapable of adequately supporting the platform support 20, the practiceplatform 14, and a golfer as the platform support 20 and practiceplatform 14 are adjusted multi-dimensionally relative to the base 18.

[0029] Though more may be used, the adjustable support assembly 12 ofthe golf practice device of the first embodiment includes at least twoactuators 24 a, 24 b mounted to the adjustable support assembly 12. Forexample, as shown in FIG. 2, the actuators 24 a, 24 b may be mounted tothe base 18 and the platform support 20 of the adjustable supportassembly 12 using spherical or pivotal bearings 48. Alternatively, asshown in FIG. 3, the actuators 24 a, 24 b may be mounted to the centraluniversal joint 22 and either the platform support 20 or the base 18 ofthe adjustable support assembly 12. In such a design, the first actuator24 a is mounted to the base 18 at its proximal end 47 a and to thecentral universal joint 22 at its distal end 51 a, and the secondactuator 24 b is mounted to platform support 20 at its proximal end 47 band to the central universal joint 22 at its distal end 51 b. Where thedesign depicted in FIG. 3 is used, it is preferred to mount the distalends 51 a, 51 b of the actuators 24 a, 24 b to the central universaljoint 22 using clevis-type joints 49, while the proximal ends 47 a, 47 bare preferably mounted to the base 18 and platform support 20 usingpivotal or spherical bearings 48.

[0030] The actuators 24 a, 24 b included in the adjustable supportassembly 12 of the first embodiment are bi-directional actuators and maybe placed under independent electronic control. As the actuators 24 a,24 b are independently controlled to extend or retract, the platformsupport 20 is moved multi-dimensionally through the range of motionafforded by the central universal joint 22. Moreover, as the platformsupport 20 achieves a desired position, the actuators 24 a, 24 b serveto maintain the platform support 20 in place. Thus, the actuators 24 a,24 b and their mounting means must be robust enough to withstand thesignificant stresses imposed as the practice platform 20 is moved andmaintained in place during use of the golf practice device 10 of thepresent invention.

[0031] Though several known actuators (e.g., actuators includinghydraulic cylinders, pneumatic cylinders, or mechanical drives) andmounting means may be used under such conditions, actuators includingmechanical drives, particularly those comprising a lead screw and anelectromagnetic motor, are presently preferred (SKF USA, Inc. ofBethlehem, Pennsylvania, USA, distributes a range of such actuators thatare well suited for application in the present invention). Actuatorsincluding mechanical drives are preferred over pneumatic or hydraulicactuators because they are capable of consistently providing preciselinear adjustments of over wide temperature ranges withoutrecalibration. This performance characteristic, in turn, results inprecise angular adjustments to the platform support that are repeatableover wide temperature ranges without recalibration. In addition,actuators including mechanical drives result in a weight savings overpneumatic or hydraulic actuators, which generally must be significantlylarger and heavier than actuators including mechanical drives in orderto handle the same operational stresses.

[0032] Though the adjustable support assembly 12 of the first embodimentof the present invention has been described as including a centraluniversal joint 22, the adjustable support assembly 12 is not limited bysuch a design. For example, where the adjustable support assembly 12includes three or more actuators 24 a-24 c (shown in FIG. 5), the needfor a central universal joint may be obviated.

[0033]FIG. 5 illustrates an adjustable support assembly 12 having threeactuators 24 a 24 c positioned between and mounted to the base 18 andthe platform support 20, but as is easily appreciated, the adjustablesupport assembly 12 of FIG. 5 lacks a universal joint mounted to boththe platform support 20 and the base 18. As before, the actuators 24a-24 c are bi-directional actuators that may be independentlyelectronically controlled.

[0034] The actuators 24 a-24 c are preferably mounted to the base 18 andthe platform support 20 using pivotal or spherical bearings 48. However,any mounting means known in the art allowing the actuators 24 a-24 c tomove the platform support 20 multi-dimensionally may be used. Further,the actuators 24 a-24 c are positioned about the adjustable supportassembly to maximize multi-dimensional movement of the platform support20 relative to the base 18 while retaining stability. For example, as isillustrated in FIG. 5, the first actuator 24 a may be positioned andmounted near a first end 50 of the platform support 20 and base 18,while the second and third actuators 24 b, 24 c are positioned andmounted near a second end 52 of the platform support 20 and base 18. Insuch a design, the first actuator 24 a may be used to control theelevation of the first end 50 of the platform support, and the secondand third actuators 24 b, 24 c are used to control the elevation of thesecond end 52 of the platform support 20 while simultaneouslycontrolling the inclination or declination between the front side 54 ofthe platform support 20 and the back side 56 of the platform support 20.Though only three actuators 24 a-24 c are illustrated in FIG. 5, morethan three actuators may be used as desired, and the relative positionsof the actuators between the base 18 and platform support 20 may bevaried depending on the size and shape of the platform support 20 orbase 18, or the amount of adjustability desired.

[0035] The adjustable support assembly 12 of the first embodiment of thepresent invention also includes a protective curtain or bellows 60mounted to and extending between the platform support 20 and the base 18(shown in FIG. 1). As is shown in FIG. 1, the bellows 60 preferablyperipherally surrounds the electrical and mechanical systems of theadjustable support assembly, and may be mounted about the outerperimeters of the frames (hidden from view in FIG. 1) of both theplatform support 20 and the base 18 of the adjustable support assembly12. Further, the bellows 60 is preferably securely affixed to both thebase 18 and the platform support 20, thereby minimizing the possibilityof injury to the user of the present invention or passers-by which mayresult from contact with any electrical or mechanical system associatedwith the adjustable support assembly 12. The secure, substantiallycontinuous affixation of the bellows 60 also protects such systems fromfouling by weather, dust, debris, vandals, or small animals, problemswhich have been reported in existing devices lacking such a feature.

[0036] A variety of materials known in the art may be used to make thebellows 60. For example, the bellows 60 is preferably fabricated usingeither a flexible polymer material or a fabric. The material used forthe bellows 60 is preferably resistant to UV light degradation, durable,and weather resistant. Where fabric is used, it may be inherentlyweather resistant or it may be coated or laminated in order to achieveresistance to the elements. For example, a heavy-duty, coated syntheticfabric, such as nylon laminated with a breathable GORE-TEXT™ membrane orrubber coated nylon that is moisture and air impermeable, is suitabledepending on the environment in which the golf device is to be used.Further, where polymer material is used to create the bellows 60,UV-stabilized, impact-modified ABS or high density polyethylene (HDPE)is preferred. In order to provide a durable area for attachment to thebase 18 and the platform support 20, the bellows 60 may includereinforcing members, such as eyelets or grommets. Further, where fabricis used for the bellows 60, the area of attachment may be reinforced,for example, by a dual cloth layer, a rope, a cable, or other elongatedelement sewn into a hem. Alternatively, where the bellows 60 is madefrom a polymer material, reinforcement may also be provided by simplyincluding areas of increased material thickness where the bellows 60 isto be attached to the base 18 and platform support 20.

[0037] Presently, the first embodiment of the golf practice device ofthe present invention is provided with an adjustable support assembly 12having a bellows 60 constructed of a synthetic fabric having polymerstrips as reinforcing members. The polymer strips are sewn into thefabric of the bellows 60 in the areas where the bellows 60 is attachedto the base 18 and the platform support 20. The bellows 60 is thenpermanently affixed to the base 18 and the platform support 20 bydriving screws or rivets through the areas of the bellows 60 reinforcedby the polymer strips and into the base 18 and the platform support 20.

[0038] A practice platform 14 is attached to the platform support 20 ofthe first embodiment of the golf practice device 10 of the presentinvention (shown in FIG. 1). The practice platform 14, therefore, may bearticulated through the multi-dimensional range of motion of theplatform support 20 upon extension or retraction of one or more of theactuators (hidden from view in FIG. 1) included in the adjustablesupport assembly 12. The practice platform 14 is attached to theplatform support 20 by any suitable means known in the art. For example,the practice platform 14 may be bolted, screwed, riveted, bonded, orwelded to the platform support 20. Riveting the practice platform 14 tothe platform support 20 using stainless steel rivets is presentlypreferred because it provides a rugged, weather resistant, and permanentattachment of the practice platform 14 to the platform support 20.Riveting also results in a practice platform 14 that is less susceptibleto vibration and less likely to partially or completely detach due tothe loosening of screws or bolts over time.

[0039] A second embodiment of the golf practice device 10 of the presentinvention is illustrated in FIG. 6. The second embodiment also includesan adjustable support assembly 12, a practice platform 14, and anelectronic control unit 16. As can be seen in FIG. 7, the adjustablesupport assembly 12 of the second embodiment includes a base 18, aplatform support 20, and two or more actuators 24 a, 24 b. However,unlike that of the first embodiment, the adjustable support assembly 12of the second embodiment of the golf practice device 10 of the presentinvention is not contained entirely underneath the practice platform 14.

[0040] The base 18 of the adjustable support assembly 12 of the secondembodiment includes a substantially horizontal portion 89, a firstelevated portion 90, and a second elevated portion 92 opposing the firstelevated portion 90. The substantially horizontal portion 89 of the base18 extends between the first elevated portion 90 and the second elevatedportion 92. Thus, the substantially horizontal portion 89 of the base 18serves to locate and maintain the first and second elevated portions 90,92 in their desired positions and supports the first and second elevatedportions 90, 92 as such portions bear stresses exerted by and on theplatform support 20 during use of the golf practice device 10.

[0041] As shown in FIG. 7, the first elevated portion 90 of the base 18may simply extend upward and away from the substantially horizontalportion 89 of the base 18. Further, the first elevated portion includesa first mounting point 96 a positioned at a desired distance above thesubstantially horizontal portion 89 of the base 18. The first mountingpoint 96 a includes a universal joint 100, such as a spherical bearingor Heim joint.

[0042] While the second elevated portion 92 of the base 18 also extendsupwardly and away from the substantially horizontal portion 89 of thebase 18, the second elevated portion additionally includes a firstoverhang 104 extending back over the substantially horizontal portion89. Two actuators 24 a, 24 b are mounted to the first overhang 104 insuch a way that the actuators 24 a, 24 b extend generally down and awayfrom the first overhang 104. The actuators 24 a, 24 b are preferablymounted using pivotal or spherical bearings 48, but the actuators 24 a,24 b may also be mounted by any other means known in the art that enableindependent extension and contraction of the actuators 24 a, 24 b afterthe platform support 20 is mounted to the base. The distal ends 108 a,108 b of the actuators 24 provide second and third mounting points 96 a,96 b, each including a universal joint 100, such as a spherical bearingor Heim joint.

[0043] The platform support 20 is mounted to the base 18 of theadjustable support assembly 12 of the second embodiment using themounting points 96 a-96 c. The platform support 20 includes a first end110 and a second end 112, which opposes the first end 110. The first end110 is mounted to base 18 via the first mounting point 96 a provided atthe first elevated portion 90, and the second end 112 is mounted to thebase via the second and third mounting points 96 b, 96 c provided at thedistal ends 108 a, 108 b of the actuators 24 a, 24 b. Because each ofthe mounting points 96 a-96 c is located at a desired distance above thesubstantially horizontal portion 89 of the base 18, mounting theplatform support 20 to the base 18 via the mounting points 96 a-96 csuspends the platform support 20 above the substantially horizontalportion 89 of the base 18. As will be appreciated by those of skill inthe art, controlled, independent extension and retraction of theactuators 24 a, 24 b facilitates multi-dimensional movement of theplatform support 20, enabling the platform support 20 to accuratelysimulate various uphill, downhill, and sidehill grades.

[0044] As shown in FIG. 8 and FIG. 9, the adjustable support assembly 12of the second embodiment of the present invention may also utilize morethan two actuators 24 a-24 d. Instead of having a first elevated portion90 that simply extends upwardly and away from the substantiallyhorizontal portion 89 of the base 18, the first elevated portion 90 of abase 18 of an adjustable support assembly 12 of the second embodimentmay also include a second overhang 105 extending back over thesubstantially horizontal portion 89 of the base 18. Three or moreactuators 24 a-24 d are mounted at the first and second overhangs 104,105 in such a way that the actuators 24 a-24 d extend generally down andaway from the overhangs 104, 105. As before, the actuators 24 a-24 d arepreferably mounted using pivotal or spherical bearings 48 but may bemounted by any means known in the art that enable the actuators 24 a-24d to adjust the platform support 20 multi-dimensionally relative to thebase 18. The distal ends 108 a-108 d of the actuators 24 a-24 d includemounting points 96 a-96 d, which include a universal joint 100, such asa spherical bearing or a Heim joint. First and second opposing ends 110,112 of the platform support 20 are mounted to the mounting points 96a-96 d to provide a platform support 20 suspended above thesubstantially horizontal portion 89 of the base 18, the platform support20 being capable of multi-dimensional movement relative to the base 18upon extension or retraction of one or more of the actuators 24 a-24 d.

[0045] The actuators 24 a-24 d used in the adjustable support assemblyof the second embodiment of the present invention are bi-directionalactuators that may be placed under independent electronic control.Again, though any known bi-directional actuator capable of withstandingthe operational stresses experienced during use of the golf practicedevice of the present invention may be used (e.g., actuators includinghydraulic cylinders, pneumatic cylinders, or mechanical drives), it ispresently preferred to use actuators including mechanical drives forthose reasons already explained.

[0046] Even though the base 18 of the adjustable support assembly 12 ofthe second embodiment of the golf practice device of the presentinvention is illustrated in FIG. 5 through FIG. 8 as including a framestructure, the construction of the base 18 is not so limited. Forinstance, instead of a frame structure, the base 18, or one or moreportions thereof, may be constructed using generally planar sheets ofmaterial, or a combination of frame structures and generally planarsheets of material. Moreover, the substantially horizontal portion 89 ofthe base 18 may comprise, for instance, a concrete slab or even the deckof a ship or boat having the first and second elevated portions 90, 92of the base 18 attached thereto. Regardless of its configuration, thebase 18 of the adjustable support assembly 12 of the second embodimentmay be constructed using any materials or fabrication means known in theart, including, for example, those discussed in relation to the firstembodiment. It is preferred that such materials and fabrication meansresult in a base 18 that is weather resistant, corrosion resistant andable to withstand the stresses exerted during use of the golf practicedevice of the present invention.

[0047] The platform support 20 of the adjustable support assembly 12 ofthe second embodiment of the present invention may be constructed as aframe structure having a platform member fastened thereto, as isdescribed in conjunction with the first embodiment. However, as isillustrated in FIG. 7 through FIG. 9, it is presently preferred toconstruct the platform support 20 using a single substantially planarsheet of material. Though various metal alloys, composites, and polymermaterials known in the art may be used to create a substantially planarsheet suitable for use as a platform support 20, composite structuralmaterials, such as those manufactured by M.C. Gill Corp., are preferred.

[0048] Where the base 18 of the adjustable support assembly 12 of thesecond embodiment of the present invention is constructed of a framestructure, protective panels may be affixed to the first and secondelevated portions 90, 92 of the base. Such protective panels serve toinhibit access to the mechanical and electrical systems included in theadjustable support assembly 12 and work to minimize or prevent injuriesdue to contact with such systems.

[0049] As a further protection, the base 18 of the adjustable supportassembly 12 of the second embodiment of the present invention alsoincludes bellows 60 attached to and extending between the platformsupport 20 and any overhangs having actuators mounted thereto. As isshown in FIG. 6, and FIG. 10, the bellows 60 preferably peripherallysurround the electrical and mechanical systems (hidden from view in thefigures) underlying the overhangs 104, 105. For example, the bellows 60may be mounted about the underside of the overhangs 104, 105 and also toan upper surface of the platform support 20. Further, the bellows 60 ispreferably securely affixed to the overhangs 104,105 and the platformsupport 20, thereby minimizing the possibility of injury which mayresult from contact with any electrical or mechanical system enclosed bythe bellows 60. The secure, substantially continuous affixation of thebellows 60 also protects such systems from damage or fouling by weather,dust, debris, vandals, or small animals, problems which have beenreported in existing devices lacking such a feature.

[0050] As is true of the bellows 60 of the first embodiment, a varietyof materials known in the art may be used to make the bellows 60 of theadjustable support assembly 12 of the second embodiment. For instance aflexible polymer material or fabric may be used. However, whatevermaterial is used, it is preferably resistant to UV light degradation,durable, and weather resistant. As before, where fabric is used, it maybe inherently weather resistant or it may be coated or laminated inorder to achieve resistance to the elements. For example, a heavy-duty,coated synthetic fabric, such as nylon laminated with a breathableGORE-TEX™ membrane or rubber coated nylon that is impermeable to air andmoisture, is suitable depending on the environment in which the golfdevice is to be used. Further, where a polymer material is used tocreate the bellows 60, UV-stabilized, impact-modified ABS or HDPE arepreferred. Moreover, the bellows 60 may be attached to the platformsupport 20 and overhangs 104, 105 using any known means, and ifnecessary, may include reinforcing members, such as those described inrelation to the first embodiment.

[0051] Like the practice platform 14 of the first embodiment, thepractice platform 14 of the second embodiment of the golf practicedevice 10 of the present invention is attached to the platform support20 (shown in FIG. 6 and FIG. 10). The practice platform 14, therefore,is articulated through the multi-dimensional range of motion of theplatform support 20 upon extension or retraction of one or more of theactuators (hidden from view in FIG. 6 and FIG. 10) included in theadjustable support assembly 12. As was true with regard to the firstembodiment, the practice platform 14 of the second embodiment isattached to the platform support 20 by any suitable means known in theart. For example, the practice platform 14 may be bolted, screwed,riveted, bonded, or welded to the platform support 20. Again, rivetingthe practice platform 14 to the platform support 20 using stainlesssteel rivets is presently preferred.

[0052] Though each of the embodiments described herein includesadvantages over prior art devices, the second embodiment of the golfpractice device of the present invention is presently preferred. Aproblem associated with prior art golf practice devices havingadjustable practice platforms is that the height between the ground andthe top of the practice platform, or “step-up height”, was often solarge as to produce anxiety or sensations of imbalance in users.Advantageously, the design of the adjustable support assembly of thefirst embodiment of the present invention can reduce the step-up heightto eleven inches or less. However, because the actuators included in theadjustable support assembly of the first embodiment are locatedunderneath the platform support, the step-up height of a golf practicedevice according to the first embodiment must be at least as high as theunderlying actuators. In contrast, the actuators included in theadjustable support assembly of the second embodiment of the presentinvention are positioned over the platform support, and, as aconsequence, the minimum step-up height of the golf practice deviceaccording to the second embodiment is not limited by the minimum heightof the actuators. For example, a golf practice device according to thesecond embodiment may be manufactured to have a step-up height ofapproximately seven inches while maintaining a practice platform capableof taking on a 5° slope about two different horizontal and substantiallyorthogonal axes of rotation. Therefore, the second embodiment of thegolf practice device of the present invention may be manufactured tohave a step-up height that is significantly smaller than that of thefirst embodiment, resulting in a golf practice device that is relativelyeasier and more comfortable to use.

[0053] The practice platform 14 of the golf practice device of thepresent invention (illustrated alone in FIG. 11) is sized to allow agolfer to comfortably address a golf ball and repetitively practiceshots in various platform orientations simulating uphill, downhill, orsidehill grades, or any combination thereof. The practice platform 14comprises a continuous structure and is defined by a top surface and abottom surface (not visible in FIG. 11) as well as an outside perimeter.The practice platform 14 may be fabricated in a variety of shapes, but agenerally rectangular shape is preferred. Additionally, the practiceplatform 14 is preferably constructed of a material that is corrosionresistant, insensitive to daily or seasonal temperature fluctuations,resistant to UV degradation, and of sufficient durability and strengthto support a golfer and withstand regular use. For example, the practiceplatform 14 may be fabricated from coated steel or a corrosion-resistantalloy, such as stainless steel, a titanium alloy, or an aluminum alloy.Alternatively, the practice platform 14 may be constructed of acomposite material, a resin, or a polymer, such as ABS or HDPE. It ispresently preferred to construct the practice platform 14 usingthermo-formed, impact-modified, and UV-stabilized HDPE, as this materialresults in a durable, non-corrosive, lightweight, and relativelyinexpensive practice platform 14 that is resistant to UV degradation andis easily formed into a continuous structure of the appropriate shape.

[0054] The practice platform 14 of the golf practice device of thepresent invention may include several features. Among these features aredrainage holes 126, a standing area 128 to be used by a golfer whilepracticing, and a tray 132 wherein different inserts 134 simulatingvarying grass lengths or sand trap conditions can be disposed. Further,the practice platform 14 preferably includes at least one depression 140allowing easy storage of and access to a plurality of golf balls duringa practice session. Thermo-formed, impact-modified, and UV-stabilizedHDPE is easily formed through rotational or injection molding processesto produce a practice platform 14 including each of these features.

[0055] The drainage holes 126 pass through the practice platform andallow water to easily drain off of the practice platform to the uppersurface of the platform support. Because the upper surface of theplatform support of each embodiment of the present invention issubstantially continuous and planar, the draining water easily passes toone of the edges of the platform support where it is shed from the golfpractice device.

[0056] The standing area 128 to be used by a golfer includes a series ofraised ribs 130. Though any desirable dimensions may be used, the raisedribs 130 are preferably spaced on 2″ centers and are approximately 1″wide by ½″ tall. The raised ribs 130 provide open avenues for watertravel and thereby help to prevent the standing area 128 from becomingwaterlogged after the golf practice device of the present invention isexposed to precipitation. Moreover, the convoluted surface provided bythe raised ribs 130 results in a stronger practice platform 14 betterable to withstand the compressive and angular forces exerted by apracticing golfer.

[0057] A mat 142 (shown in place in FIG. 1, FIG. 6, and FIG. 10), whichmay be fabricated of synthetic grass and/or rubber, is removably placedover the series of raised ribs 130 and covers the standing area 128 tobe used by a golfer while practicing. The mat 142 is preferablyperforated or otherwise fabricated to allow the passage of water. Thoughvarious known materials may be used to fabricate the mat 142, acommercial grade ASTROTURF™ surface with a rubberized backing ispresently preferred. The mat 142 should be forgiving yet sufficientlyrigid that when it is positioned over the series of raised ribs 130, avalley 144 is formed between each raised rib 130, even when a golfer isstanding on the mat 142 (illustrated in FIG. 12). These valleys 144 arenot so apparent to a golfer as to be intrusive or upsetting, yet theyallow water to pass through the mat 142, into the valleys 144, and outof the standing area 128 used by a golfer while practicing.

[0058] Removable placement of the mat 142 over the series of raised ribs130 may be achieved by means known in the art. For example, the practiceplatform 14 may include attachment areas 146 for the mat (illustrated inFIG. 11) whereon two sided adhesive tape is adhesively attached.Alternatively, one side of a two sided hook and loop adhesive system,such as VELCRO™, may be attached by known means such as adhesive,screws, or rivets, to the attachment areas 146 included on the practiceplatform 14, and the second side of the two sided hook and loop systemmay be attached to the mat 142 by similar means. Removable attachment ofthe mat 142 is advantageous in that it allows removal of the mat 142 forcleaning or replacement.

[0059] The tray 132 included on the practice platform 14 is structurallycontinuous with the remainder of the practice platform 14 andfacilitates the removable placement of a variety of inserts 134simulating various lengths of grass or sand trap conditions. The tray132 includes a recess defined by a bottom surface 150 and sidewalls 152a-152 d, and may include a depression (not illustrated in FIG. 11) inone of the sidewalls 152 a-152 d which allows easy removal of an insert134 disposed within the tray 132. The various inserts 134 may beremovably disposed within the tray 132 using any suitable means known inthe art. For example, snap-fit connectors, VELCRO™, or other, largerhook and loop systems, may be used to removably place the inserts 134within the tray 132. However, it is presently preferred to removablyplace the inserts 134 within the tray 132 using a friction-fit. Theinserts 134, therefore, are preferably sized such that, when an insert134 is placed within the tray 132, the outer perimeter of the insert 134abuts the sidewalls 152 a-152 d of the tray 132, thereby creating apressure between the insert 134 and the sidewalls 152 a-152 d whichmaintains the insert 134 in place during use.

[0060] As was mentioned, a variety of inserts 134 simulating varyinggrass lengths can be utilized in conjunction with the golf practicedevice of the present invention. Commercially available synthetic grasspanels simulating several different grass conditions, such as tee box,fairway, or rough conditions, may be used to fabricate various inserts134 by means known in the art. For example, as is shown in FIG. 1 andFIG. 13, an insert 134 may be produced by affixing a synthetic grasspanel 160 of a given length to a backing 162 by any suitable means, suchas bonding, gluing, screwing or riveting. Alternatively, as isillustrated in FIG. 6 and FIG. 14, synthetic grass panels 160 a, 160 bof differing lengths may be affixed to a single backing 162 to producean insert 134 simulating more than one grass length. The backing 162 ofthe inserts 134 is preferably fabricated of material that is impactresistant, substantially non-corrosive, UV resistant, and able towithstand normal daily and seasonal temperature extremes, such asthermo-formed, impact-modified, and UV-stabilized ABS or HDPE.

[0061] The synthetic grass panels 160 used to create an insert 134 mayallow the face of a golf club (particularly a golf iron) to travelunderneath a golf ball resting on the insert 134 as a golf swing isexecuted and the golf ball is struck. For example, the synthetic hittingsurfaces manufactured by FIBERBUILT® Manufacturing, Inc. of Shelby,Mont., USA, allow the face of a club to travel underneath a golf ball asthe golf ball is struck and are well suited for fabricating inserts 134simulating various grass lengths. Synthetic grass panels 160 that allowa club face to travel underneath a golf ball as the golf ball is strucknot only more accurately simulate golf shots taken on natural turf, butalso substantially reduce or eliminate the hand shock, arm injury, andclub damage often associated with synthetic grass mats.

[0062] Additionally, permanent or removable golf tees may be provided inthe inserts 134. For example, an insert 134 having a permanentlyattached golf tee may be fabricated by providing a synthetic grass panel160 having a small hole, passing a golf tee having a tee shaft and teeanchor through the small hole in the grass panel 160, such that the teeshaft extends out from a top surface of the grass panel and the teeanchor prevents the tee from passing through the grass panel. The tee isthen permanently incorporated into the insert 134 by affixing the grasspanel 160 to a backing 162 as has already been discussed. An insert 134having a removable tee may simply include a small hole passing throughits entirety (i.e., through the synthetic grass panel 160 and thebacking 162). When tee shots are desired, a tee including a tee shaftand tee anchor may be passed through the small hole, and the insert 134positioned within the tray 132 of the practice platform, the tee anchormaintaining the tee in place during use. When tee shots are no longerdesired, the insert 134 may be removed from the tray 132, the teeremoved, and the insert 134 replaced.

[0063] An insert 134 designed to simulate sand trap conditions may alsobe fabricated using materials and means known in the art. As illustratedin FIG. 15, such an insert 184 includes four surrounding sides 180 a-180d and a bottom surface 182. The sand trap insert 184, therefore, isitself substantially shaped like the tray 132 of the practice platform14, but its dimensions allow the sand trap insert 184 to fit within thetray 132. The sand trap insert 184 may be fabricated of any suitablematerial known in the art, such as thermo-formed, impact-modified, andUV-stabilized ABS of HDPE. When a sand trap insert 184 is positionedwithin the tray 132, the four surrounding sides 180 a-180 d of the sandtrap insert 184 are preferably in contact with the sidewalls of thetray. Contact between the sidewalls of the tray and the surroundingsides 180 a-180 d of the sand trap insert 184 not only facilitatesremovable placement by a friction-fit, but also serves to inhibit themigration of large amounts of sand from the sand trap insert 184 to thebottom surface of the tray 132.

[0064] The practice platform 14 of the golf practice device 10 of thepresent invention may be designed for use by right handed golfers, lefthanded golfers, or right and left handed golfers. A practice platform 14designed to allow the golf practice device 10 of the present inventionto be used by both right and left handed golfers is illustrated inFIG. 1. The practice platform 14 includes an approach side 190, a targetside 192, and first and second sides 194, 196 having first and secondupwardly extending ridges 198, 200 at their edges (the first side 194and first upwardly extending ridge 198 being behind the golfer as thegolfer addresses the ball on the practice platform 14). The approachside 190 will generally be used by the golfer to step up onto thepractice platform 14 and is farthest from the intended target orintended direction of travel of the golf ball. The target side 192 isopposite the approach side 190 and is closest to the intended target orintended direction of travel of the golf ball. Neither the approach side190 nor the target side 192 of a practice platform intended for use byright-handed and left-handed golfers includes an upwardly extendingridge. The two sides 194, 196 having upwardly extending ridges 198, 200are in front of and behind a golfer as the golfer addresses a golf ballin preparation for a practice shot. The upwardly extending ridges 198,200 at these two sides 194, 196 provide visual and physical referencesfor a golfer and may serve to prevent a golfer from accidentallystepping off or slipping off the practice platform 14. Moreover, one orboth of the upwardly extending ridges 198, 200 may include a depression140 which allows storage of and access to a plurality of golf ballsduring a practice session.

[0065] As is easily appreciated, a golf practice device 10 including apractice platform 14 having no upwardly extending ridges on either theapproach side 190 or target side 192 is easily converted from righthanded to left handed use and vice-versa. To accomplish this conversion,the golf practice device 10 need only be rotated 180°. If the golfpractice device 10 is positioned for right-handed use, the positions ofthe tray 132 and the standing area 128 to be used by a golfer whilepracticing are the mirror opposite of what they should be for aleft-handed golfer. However, by simply rotating the golf practice device10 through 180° relative to the target area or intended direction oftravel of the golf ball, the positions of the tray 132 and the standingarea 128 to be used by a golfer while practicing are reversed.Therefore, where the practice platform 14 is designed to enable use byright-handed and left-handed golfers, the approach side 190 of thepractice platform 14 for a right-handed golfer simply becomes the targetside 192 of the practice platform 14 for a left-handed golfer andvice-versa.

[0066] The practice platform 14 may also be fabricated for dedicated useby right-handed golfers or by left-handed golfers. For example, FIG. 6shows a golf practice device 10 having a practice platform 14 fabricatedand mounted for dedicated use by right-handed golfers, and FIG. 10 showsa golf practice device 10 having a practice platform 14 fabricated andmounted for dedicated use by left-handed golfers.

[0067] Where the practice platform 14 is fabricated for use only byright-handed golfers or only by left-handed golfers, the practiceplatform 14 includes a third upwardly extending ridge 201 along the edgeof the intended target side 194 of the practice platform 14. This thirdupwardly extending ridge 201 intersects the first upwardly extendingridge 198 at the edge of the first side 194 behind a golfer as thegolfer addresses the ball in preparation for a practice shot. However,in order to provide free space for the head of the swinging club and theexiting ball, the third upwardly extending ridge 201 on the target side194 does not extend the entire length of the target side 194. The thirdupwardly extending edge 201 may provide an added sense of security to auser of the golf practice device of the present invention, but itcreates a practice platform 14 with a dedicated target side 194 thatcannot be properly used by right- and left-handed golfers. As is easilyappreciated by reference to FIG. 6 and FIG. 10, whether or not a golfpractice device 10 is dedicated to right-handed or left-handed usedepends entirely upon how the practice platform 14 having a thirdupwardly extending ridge 201 is mounted to the adjustable supportassembly 12.

[0068] It should be understood, however, that the practice platform ofthe golf practice device of the present invention may be fabricatedusing one, two, or three upwardly extending ridges at the edges of thepractice platform. It is simply presently preferred to include only twoupwardly extending ridges positioned in front of and behind a golfer asthe golfer addresses a golf ball on the practice platform because doingso results in a golf practice device that is easily used by right- andleft-handed golfers.

[0069] As already mentioned, each embodiment of the golf practice device10 of the present invention also includes an electronic control unit(hereinafter an “ECU”)16. The ECU 16 is preferably housed in a body 330that may be mounted to or formed as part of a support 210 which extendsup from the adjustable support assembly 12 and is preferably hollow.Moreover, the support 210 preferably extends out of the flange 42 of theplatform support 20 of a golf practice device 10 according to the firstembodiment (so that the substantially continuous nature of the uppersurface of the platform support 20 is maintained), while the support 210preferably extends out of the top surface 107 of an overhang 104, 105included in the base 18 of a golf practice device 10 according to thesecond embodiment of the present invention. Because the ECU 16 controlsadjustment of the practice platform 14, the ECU 16 as well as itssupport 210 should be positioned to facilitate user access. Preferably,the ECU 16 is located on the golf practice device so that it ispositioned in front of or behind a golfer as the golfer addresses a golfball on the practice platform.

[0070] A schematic illustration of a golf practice device of the presentinvention including an exemplary ECU 16 is provided in FIG. 17. As shownin FIG. 16, the ECU 16 of the golf practice device 10 of the presentinvention includes a user interface 300, a processor 302, and,preferably, machine readable memory 304, such as random access memory(RAM), read only memory (ROM), programmable read only memory (PROM), orelectrically erasable programmable read only memory (EEPROM). The ECU 16may also include an outboard (to the processor 302) clock 305, such asan 8 MHZ crystal oscillator module, supplying clock signals to theprocessor 302. Further, the ECU may include a communication port 306enabling communication between the ECU 16 and an external computer 308.Based on inputs provided from, for example, the user interface 300, theactuators 24, or an external computer 308, the processor 302 controlsthe actuators 24 such that the practice platform of the golf practicedevice of the present invention is adjusted as desired by the user tosimulate various golf course conditions. Though the ECU 16 of the golfpractice device of the present invention 10 is described herein asincorporating each of its various features within a single body 330, thefeatures of ECU 16 of the present invention need not be contained withina single body 330 and may be located about the golf practice device 10of the present invention as desired.

[0071] Any suitable processor 302 may be used in the ECU 16 of the golfpractice device 10 of the present invention. For instance the processor302 may be any known microprocessor or digital signal processor capableof receiving data, processing data, and communicating output or controlsignals based on the data received. Presently, it is preferred toprovide the ECU 16 with a PIC 16C64/08 microcontroller manufactured byMicrochip Technology Inc. of Chandler, Ariz., USA. However, the ECU 16of the golf practice device 10 of the present invention is not limitedto incorporation of such a processor 302.

[0072] The user interface 300 of the ECU 16 of the present inventionincludes any known interface that is not only capable of displaying to auser information output from the processor 302, but is also capable ofcommunicating signals representing user inputs to the processor 302. Forexample, it is presently preferred to provide a user interfacecomprising a weather-resistant membrane keypad 310 incorporating aplurality of input switches 312-324 b and a plurality of LCD displays326 a-326 c (illustrated in FIG. 16). Where such a user interface 300 isprovided, a user activates and controls the golf practice device of thepresent invention by actuating one or more of the plurality of inputswitches 312-324 b, and the microprocessor 302 directs the display ofappropriate information in each of the plurality of LCD displays. Amembrane-type control panel is preferred because the entire surface ofthe control panel is continuous and, therefore, provides enhancedprotection from moisture, dust, dirt, and debris. However, as is easilyappreciated, the user interface 300 may include any known input devicein combination with any known display device, provided that such inputand display devices are capable of reliable operation under theanticipated operational stresses.

[0073] As is shown in FIG. 16, the input switches 312-324 b of the userinterface 300 may control any desired function. The user interface mayinclude an “ON/OFF” switch 312 for activating and deactivating the golfpractice device. The user interface 300 also preferably includes a“CALIBRATE LEVEL” switch 314 and a “GO TO LEVEL” switch 316. TheCALIBRATE LEVEL switch 314 enables automatic or manual calibration ofthe level or “zero” position of the practice platform even when the golfpractice device is positioned on a non-level surface, and actuation ofthe GO TO LEVEL switch 316 signals the processor 302 to control theautomatic return of the practice platform to the calibrated zeroposition. Moreover, the user interface 300 may include various inputswitches for manual or automatic adjustment of the practice platform.The “SELECT PRESET” switches 318 a, 318 b allow a user to scroll througha group of “presets”, each preset representing a preprogrammed practiceplatform position or a preprogrammed practice routine including avariety of practice platform settings. Significantly, where the machinereadable memory 304 of the ECU 16 includes pre-programmed practiceroutines, such routines may simulate the terrain of various well-knowngolf courses, allowing a user to simulate a round of golf on a course ofchoice. Actuation of the “GO PRESET” switch 320 signals the processor302 to adjust the practice platform in accordance with the presetselected by the user. To facilitate manual adjustment of the practiceplatform, the user interface 300 may be provided with “MANUAL UP/DOWN”switches 322 a, 322 b and “MANUAL SIDEHILL” switches 324 a,324 b.Actuation of such switches directs the processor to control the uphill,downhill, or sidehill adjustment of the practice platform until adesired position is achieved. It must be noted, however, that the userinterface 300 illustrated in FIG. 16 is merely exemplary. The userinterface 300 of the ECU 16 of the golf practice device of the presentinvention may incorporate any number of input switches controlling anydesired function of the golf practice device of the present invention.

[0074] The LCD displays 326 a-326 c provided in the user interfaceillustrated in FIG. 16 serve to present useful information as the golfpractice device of the present invention is used. The informationpresented in each LCD display 326 a-326 c is preferably controlled bythe processor 302 and dependent upon inputs received by the processor.For instance, as a user actuates one of the “SELECT PRESET” switches 318a, 318 b, the microprocessor controls the display of an indicator 317within the first LCD display 326 a. The indicator 317 may be anydesirable text and/or graphical message indicating the preset currentlyselected. The processor 302 of the ECU 16 also receives condition datafrom each of the actuators 24, and based on such condition data, theprocessor 302 controls the display of second and third indicators 319,321 within the second and third LCD displays 326 b, 326 c. The secondand third indicators 319, 321 indicate the uphill, downhill, andsidehill grades taken on by the practice platform and may include anyappropriate text and/or graphical message. Further, as a user actuatesany one of the MANUAL UP/DOWNHILL 322 a, 322 b or MANUAL SIDEHILL 324 a,324 b switches, the processor not only controls the adjustment of thepractice platform according to the user's desire, but also continuouslyupdates the second and third indicators 319, 321 according to thecondition information received from the actuators 24. Again, however,the user interface 300 of the ECU 16 of the present invention mayinclude more or less than three displays, and processor 302 may beprogrammed to control such displays to provide any information deemedbeneficial to a user.

[0075] The processor 302 of the ECU 16 of the golf practice device 10 ofthe present invention may be configured as desired to facilitateoperation of the golf practice device 10 as described. However, apreferred configuration for a golf practice device 10 including twoactuators is presently described in order to more completely illustratethe interaction between the user interface 300, the processor 302, andthe actuators 24 included therein.

[0076] Where the present invention includes two actuators and a userinterface as illustrated in FIG. 16, it is preferred that inputswitches, except the ON/OFF switch 312, be connected directly to aninput/output pin of the processor, each of such input/output pins beingconfigured as an input. Signals generated by actuation of the inputswitches 314-324 b are preferably processed internally by the processorto produce appropriate output signals. It is further preferred todesignate two input/output pins of the processor for each axis ofdirectional control and actuator control, such input/output pins beingconfigured as outputs. Output signals generated by the processor andcommunicated via these directional pins drive field-effect transistors(FETs) which, in turn, drive the coils of cross-connected relays. Whenthe directional pins are high, the coils of the cross-connected relaysare energized and movement in the positive direction of each axis isfacilitated. Two additional input/output pins are also preferablyconfigured as outputs and designated for actuator control. When thesetwo additional pins are high, optocouplers are energized and drive gatesof high power metal-oxide-semiconductor field-effect transistors(MOSFETs). For example, IRFP044N transistors manufactured byInternational Rectifier Corp. of El Segundo, Calif., USA, may be used.When energized, such MOSFETs provide a very low resistance return forthe windings of the motors driving the actuators. It is furtherpreferred that eight input/output pins be employed for transferring datato LCD display drivers included in the ECU. Finally, two input/outputpins are preferably configured as inputs designated to receive signalsgenerated by encoders included in the actuators. As the actuators areextending or contracting, signals sent by the encoders to the twodedicated pins indicate the exact extension of each actuator. Thesignals generated by the encoders are processed by the processor toproduce output signals to the LCD drivers corresponding to the uphill,downhill, or sidehill position of the practice platform.

[0077] Though not necessary, a communication port 306 enablingcommunication between the ECU 16 and an external computer 308 expandsthe potential capabilities of the golf practice device 10 of the presentinvention. In particular, an external computer may include one or moreupdated or additional pre-programmed practice routines not includedwithin the machine readable memory 304 included in the ECU 16.Interaction between the external computer 308 and the ECU 16 via thecommunication port 306 could, therefore, facilitate execution of suchadditional practice programs by the golf practice device 10, therebyexpanding its stand-alone capabilities.

[0078] As mentioned, the support 210 for the ECU 16 is preferablyhollow. Moreover, the support 210 is preferably removably mounted to theadjustable support assembly 12 of the golf practice device 10 of thepresent invention, with the ECU 16 preferably being positioned near thetop end 209 of the support 210. Removable attachment of the support 210may be achieved using any suitable means known in the art, such as boltsor screws. Removable attachment of the support 210 is preferred becauseeasy detachment and re-attachment of the support 210 enhances theportability of the golf practice device 10 of the present invention.

[0079] The support 210 may be fabricated of any material that isdurable, substantially non-corrosive, and UV resistant. For example, thesupport 210 may be fabricated of a polymer, such as thermo-formed,impact-modified, and UV-stabilized ABS or HDPE, or the support 210 maybe fabricated of lightweight steel provided with a suitablecorrosion-resistant coating.

[0080] Where a hollow support 210 is provided, any electrical orcommunication lines necessary to power the ECU 16 or to facilitatecommunication between the ECU 16 and other internal or externalcomponents may be disposed within the support 210. In order to easeattachment and detachment of the support 210 and, when applicable, theECU 16, each electrical or communication line disposed within thesupport 210 may be provided with a suitable connector near the top end209 or the bottom end 211 of the support 210. Where such connectors areincluded, any one of a variety of commercially available wiringconnectors may be used.

[0081] As shown in FIG. 1, FIG. 6, and FIG. 10, the electronic controlunit 16 may be housed in a body 330 including a front surface, backsurface, top surface, bottom surface (not visible), and two sidesurfaces. The body 330 is substantially weather resistant and may befabricated using known materials which are durable, substantiallynon-corrosive, and resistant to UV degradation. For example, the body330 may be fabricated using aluminum alloy, stainless steel, coatedsteel, or thermo-formed, impact-modified, and UV-stabilized ABS or HDPE.

[0082] The body 330 of the ECU 16 may be removably fastened to thesupport 210 using any means known in the art, such as bolts or screws.Where the body 330 is removably fastened to the support 210, the body330 is preferably fastened to the support 210 at the back or bottomsurface of the body 330. Moreover, where electrical or communicationlines are disposed within the support 210, such lines preferably passout of the body 330 and into the support 210 through whichever side ofthe body 330 is removably fastened to the support 210.

[0083] Alternatively, instead of mounting the body 330 of the ECU 16 tothe support 210, the body 330 of the ECU 16 and the support 210 may beintegrally formed of a single piece of a molded material, such asthermo-formed, impact-modified, and UV-stabilized ABS or HDPE. Such adesign is desirable, as it simplifies construction of support 210 andbody 330 of the ECU 16, while eliminating the need to fasten the body330 of the ECU 16 to the support 210.

[0084] As is schematically represented in FIG. 17, pressure sensors 340may be disposed within or under the standing area 128 of the practiceplatform 14 of the golf practice device 10 of the present invention.Such pressure sensors are of great value for determining the shift inweight which occurs between a golfer's feet during the golfer's swing.The pressure sensors 340 output signals representing the weight born byeach of a golfer's foot when addressing the golf ball as well as theshift in weight occurring during a swing. The output signals arereceived by the processor 302 which, in turn, processes the signals andproduces outputs controlling the display of appropriate textual and/orgraphical information at the user interface 300. Thus, by includingpressure sensors 340 within or under the standing area 128 of thepractice platform 14 of the golf practice device 10 of the presentinvention, a golfer can understand the shift in body weight which occursduring strokes taken at different grades representing various golfcourse conditions. Using such information, the golfer can make anyadjustments necessary to arrive at a more ideal weight transfer forstrokes taken under various combinations of course conditions.

[0085] As can also be appreciated by reference to FIG. 17, the golfpractice device of the present invention may also include a measurementmodule 342. The measurement module 342 includes one or more sensorsconfigured to sense the speed, rotation, and/or direction of a golf ballafter it is struck on the practice platform of the golf practice deviceof the present invention. The measurement module 342 may also include asensor configured to sense club speed or angle as a golf swing isexecuted. The one or more sensors included in the measurement module 342may be digital or analog, and suitable digital and analog sensorscapable of sensing ball speed, rotation, and direction, as well as clubspeed and angle, are known in the art. For example, American IR, Inc. ofLas Vegas, Nev., USA, manufactures single beam, dual beam, andmulti-array emitters which are suitable for application in themeasurement module 342. Based on sensed inputs from the one or moresensors, the measurement module 342 preferably generates output signalsrepresenting an interpolated location of the struck golf ball in termsof distance and deviation from center. Such output signals are receivedby the processor 302 which, in turn, processes the output signals andcontrols the display of appropriate textual and/or graphical informationat the user interface 300 indicating the interpolated position of thestruck golf ball. Communicating the interpolated position of a struckgolf ball to a user is highly desirable, as it allows the user toreadily appreciate the effects of various adjustments to the user's golfswing or stance.

[0086] Though any suitable power source may be used, the golf practicedevice of the present invention is preferably powered from 120 volt ACpower source. However, the initial current draw of the actuators is veryhigh (i.e., 30 amps or higher), and the 120 AC power circuits generallyprovided in homes and commercial establishments may not be able tosupport such a high current draw, even for a very short period. Thus, itis presently preferred to also provide the golf practice device of thepresent invention with a battery (preferably, a twelve-volt sealedlead-acid battery). The battery serves to buffer the initially highcurrent draw of the actuators, protecting the 120 volt AC power sourcefrom sudden, unsupportable current loads. Moreover, where a battery isincluded in the golf practice device of the present invention, it ispreferably continuously charged by a power supply when the golf practicedevice of the present invention is activated. Though the battery is usedto supply electrical current required to operate the actuators includedin the present invention, a low current supply is all that is necessaryto maintain the battery at nearly full charge because the actuators areoperated under a low duty cycle. However, in order to ensure that thebattery remains adequately charged and operational, it is preferred thatgolf practice device of the present invention remain inoperable unlessthe power supply charging the battery receives AC power and is thuscapable of charging the battery. For example, a sense line may indicateoperation of the power supply, deactivating the golf practice device ofthe present invention in the absence of AC power to the power supply.Nevertheless, where necessary, the battery may provide power to operatethe processor included in the ECU, even when the power supply is notreceiving AC power, in order to preserve information stored in volatilemachine readable memory.

[0087] The electrical and communication lines of the golf practicedevice of the present invention may include any suitable, commerciallyavailable wiring, though heavy duty wiring is preferred. All of theelectrical and communication lines necessary to the function of the golfpractice device of the present invention may be incorporated into asuitable wiring harness routing the various electrical and communicationlines to their proper destinations in such a way as to avoid the risk ofdamage due to interaction with moving parts and to ease transport, setup, and service of the golf practice device of the present invention.Moreover, surge and over-current protection is preferably incorporatedinto the wiring design of the golf practice device of the presentinvention. Surge protection will serve to minimize potential damage dueto battery failure or “hot-swapping” of the battery. Over-currentprotection which may be provided, for example, by circuit breakerscorresponding to each actuator included in the adjustable supportassembly, works to prevent excessive power dissipation within theactuator motor, as well as within the driving FETs, in the unlikelyevent that an actuator is driven to its mechanical limit.

[0088] Further, it is presently preferred that the base 18 included inthe adjustable support assembly 12 of each embodiment of the golfpractice device of the present invention includes one or more wheelassemblies. Each such wheel assembly includes at least one wheel orcastor and at least one rigid arm, with each wheel or castor beingaffixed to each rigid arm using suitable means known in the art. Forexample, if the wheel assembly includes a rigid arm having a box-beamconstruction, a wheel or castor may be fitted with an attachment thatmay be inserted within a first end of the rigid arm. The wheel or castormay then be affixed by passing, for example, a pin or bolt, through therigid arm as well as the attachment fitted to the castor or wheel.Alternatively, each wheel assembly may include two spaced rigid armsthat are approximately 3½″×¼″ and made of ⅛″ thick stainless steel. Eachspaced rigid arm of such an embodiment includes a hole through which awheel axle, pin, or bolt may be disposed. A wheel may then be placedbetween the two spaced rigid arms and attached by disposing a wheelaxle, pin, or bolt through the first rigid arm, the wheel, and thesecond rigid arm. The rigid arms of the wheel assemblies discussedherein may be secured to the base 18 of an adjustable support assembly12 using any means known in the art, such as welding, bonding, riveting,bolting, or screwing, that creates a rugged, permanent or removableattachment.

[0089] The base 18 of an adjustable support assembly 12 of a golfpractice device 10 of the present invention preferably includes at leastone wheel assembly in order to facilitate at least short distancemovement of the golf practice device 10 by a single person. Thus, eachcomponent of the wheel assemblies should be fabricated by usingmaterials and means resulting in wheel assemblies of sufficient strengthto reliably support the entire weight of the golf practice device 10 ofthe present invention. Further, materials that are lightweight andsubstantially non-corrosive are preferably used.

[0090] Each aspect of the golf practice device of the present inventionis chosen to result in a device that is comfortable and easy to use aswell as moveable by one person and portable by two people. For example,the adjustable support assembly and the practice platform are designedto result in a practice platform that is adjustable multi-dimensionallyyet comfortable to approach, access and use. The adjustable supportassembly and practice platform are, therefore, designed to minimize thestep-up height between the ground and the top surface of the practiceplatform. Moreover, the size and weight of the golf practice device ofthe present invention should allow the device to be moved by one personusing the one or more wheel assemblies provided on the base of theadjustable support assembly, and the entire device is lightweight andsmall enough to be lifted by two people and transported in a pick-uptruck, sport utility vehicle, or small trailer.

[0091] The golf practice device of the present invention is, therefore,ideally suited for commercial as well as private applications. As hasbeen emphasized, the golf practice device of the present invention isprogrammable and enables a golfer to repetitively practice shots underconditions that realistically simulate various combinations of uphill,downhill, or sidehill lies, as well as various grass lengths and sandtrap conditions. However, the golf practice device is also relativelyinexpensive, comfortable to use, lightweight, easily moved by oneperson, completely portable by two persons, and can be left out of doorsuncovered for extended periods of time.

[0092] Though the golf practice device of the present invention isdescribed herein using various embodiments and figures, the scope of thepresent invention is not limited to such embodiments and figures but isdefined by the appended claims.

What is claimed is:
 1. A portable golf practice device comprising: anadjustable support assembly including a base and a platform support,configured for multi-dimensional adjustment with respect to said base,said platform support including a substantially continuous and generallyplanar upper surface; a practice platform attached to said platformsupport and including at least one drainage hole, a standing areaincluding a series of raised ribs, and a tray; a synthetic grass andrubber mat removably placed in said standing area over said series ofraised ribs; an insert removably placed in said tray, said insertsimulating one or more lengths of grass or sand trap conditions; and anelectronic control unit (ECU) configured for control of themulti-dimensional adjustment of the platform support and said practiceplatform attached thereto.
 2. The portable golf practice device of claim1, wherein said adjustable support assembly further includes at leasttwo actuators operably coupled to said ECU that may be independentlyelectronically controlled thereby, said actuators being positionedunderneath said platform support and between said platform support andsaid base.
 3. The portable golf practice device of claim 2, wherein saidadjustable support assembly further comprises a central universal joint,said central universal joint being positioned under said platformsupport and between said platform support and said base.
 4. The portablegolf practice device of claim 1, wherein said base comprises a firstframe and said platform support comprises a second frame with a platformmember being attached to said second frame of said platform support. 5.The portable golf practice device of claim 2, further comprising abellows attached to and extending between said base and said platformsupport, said bellows substantially enclosing said at least twoactuators.
 6. The portable golf practice device of claim 2, wherein saidbase further comprises at least one wheel assembly.
 7. The portable golfpractice device of claim 2, wherein said ECU comprises a processor,machine readable memory, and a user interface.
 8. The portable golfpractice device of claim 7, wherein said user interface is configured togenerate signals corresponding to user inputs and said processor isoperably coupled to said user interface to receive said generatedsignals, process said generated signals, and control saidmulti-dimensional adjustment of the practice platform responsive to theuser inputs.
 9. A portable golf practice device comprising: a platformsupport configured for multi-dimensional adjustment, said platformsupport being generally planar and having a substantially continuousupper surface; a base extending under said platform support andincluding a substantially horizontal portion extending between a firstraised portion and an opposing second raised portion, said second raisedportion including a first overhang; a first mounting point located atsaid first raised portion of said base, said first mounting pointincluding a first universal joint attached to a first end of saidplatform support; at least two actuators overlying said platform supportand attached to said first overhang, said at least two actuatorsincluding distal ends including additional universal joints, saidadditional universal joints serving as additional mounting points andbeing attached to a second, opposing side of said platform support; apractice platform attached to said platform support; and an electroniccontrol unit (ECU) operably coupled to said at least two actuators andconfigured for controlling the multi-dimensional adjustment of theplatform support and said practice platform attached thereto.
 10. Theportable golf practice device of claim 9, wherein said practice platformcomprises at least one drainage hole, a standing area including a seriesof raised ribs, a tray, a mat removably placed over said series ofraised ribs in said standing area, and an insert removably placed insaid tray, said insert simulating one or more lengths of grass or sandtrap conditions.
 11. The portable golf practice device of claim 9,wherein said first raised portion of said base further comprises asecond overhang, said second overhang having a third actuator mountedthereto, said third actuator having a distal end serving as said firstmounting point incorporating said first universal joint.
 12. Theportable golf practice device of claim 9, wherein said first raisedportion of said base further comprises a second overhang, said secondoverhang having third and fourth actuators mounted thereto, said thirdactuator having a distal end serving as said first mounting pointincorporating said first universal joint and said fourth actuator havinga distal end including one of said additional mounting pointsincorporating one of said additional universal joints.
 13. The portablegolf practice device of claim 9, wherein said base comprises a framestructure and said platform support comprises a generally planar andsubstantially continuous sheet of material.
 14. The portable golfpractice device of claim 9, further comprising a bellows attached to andextending between said first overhang and said platform support, saidbellows substantially enclosing said at least two actuators.
 15. Theportable golf practice device of claim 11, further comprising a firstbellows and a second bellows, said first bellows attached to andextending between said first overhang and said platform support and saidsecond bellows attached to and extending between said second overhangand said platform support.
 16. The portable golf practice device ofclaim 9, wherein said base further comprises at least one wheelassembly.
 17. The portable golf practice device of claim 9, wherein saidECU comprises a processor, machine readable memory, and a userinterface.
 18. The portable golf practice device of claim 17, whereinsaid user interface is configured to generate signals corresponding touser inputs and said processor is operably coupled to said userinterface to receive said generated signals, process said generatedsignals, and control said multi-dimensional adjustment of the practiceplatform responsive to the user inputs.
 19. The portable golf practicedevice of claim 17, wherein said machine readable memory of said ECUincludes a plurality of pre-programmed practice routines, each of saidplurality of pre-programmed practice routines being selectable from saiduser interface and comprising a plurality of pre-programmed practiceplatform positions simulating various different golf course conditions.20. The portable golf practice device of claim 7 , wherein said machinereadable memory of said ECU includes a plurality of pre-programmedpractice routines, each of said plurality of pre-programmed practiceroutines being selectable from said user interface and comprising aplurality of pre-programmed practice platform positions simulatingvarious different golf course conditions.